EP 2281135 A1 20110209 - HIGH-PERFORMANCE ROTARY FEEDTHROUGH
Title (en)
HIGH-PERFORMANCE ROTARY FEEDTHROUGH
Title (de)
HOCHLEISTUNGSDREHDURCHFÜHRUNG
Title (fr)
PASSAGE TOURNANT DE GRANDE CAPACITÉ
Publication
Application
Priority
- EP 2009055147 W 20090428
- DE 102008021936 A 20080502
Abstract (en)
[origin: WO2009133115A1] The present invention relates to a rotary feedthrough for an axial transfer of fluids under high pressure from a stationary machine part into a rotating machine part, the feedthrough having a stationary housing, which has an axial through opening, and forms an axial guide for a first hollow piston, wherein said piston is received so it can be axially displaced but is sealed in and/or on said guide of said stationary housing and has a first slide seal ring on the end facing toward said rotating machine part. The slide seal ring is in turn fastened to said piston to form a seal and has a flat slide seal face for the sealed slide contact with the flat slide seal face of a second slide seal ring, which is opposite to the first slide seal ring, and which forms a seal on the rotating machine part and is rotatably fastened thereto, and wherein said first piston is spring-loaded with said first slide seal ring in the direction of said second slide seal ring. In order to design a rotary feedthrough of the above-mentioned type such that even at high pressures and/or high relative velocities of the slide seal faces, the requirement for regular maintenance and/or for the replacement of the slide seal rings is minimized, according to the invention the second slide seal ring is also provided on an axially movable second hollow piston, which is received so it can be axially displaced and is sealed in and/or on a guide on the rotating machine part, wherein said second piston is spring-loaded with said second slide ring seal in the direction of said first slide ring seal.
IPC 8 full level
F16L 27/08 (2006.01)
CPC (source: EP)
F16L 27/0808 (2013.01); F16L 27/082 (2013.01)
Citation (search report)
See references of WO 2009133115A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
DE 102008021936 A1 20091105; EP 2281135 A1 20110209; EP 2281135 B1 20130529; WO 2009133115 A1 20091105
DOCDB simple family (application)
DE 102008021936 A 20080502; EP 09738159 A 20090428; EP 2009055147 W 20090428